# Relationship history for MSHA mine 1504661

Current hierarchy: **Leroy  Lackey → Red Star Coal Company → #1 Load Out**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Green Brook Coal Company Inc → #1 Load Out; 1950-01-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Jennings John G & Phillis R White Et Al → #1 Load Out; 1950-01-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Jennings John G & Phillis R White Et Al → Green Brook Coal Company Inc; 1950-01-01 to 1981-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Blackey Elkhorn Coal Corp → #1 Load Out; 1981-11-09 to 1984-11-28; source msha-controller-operator-history
- **controller_controls_mine:** Jamestown Resources Inc → #1 Load Out; 1981-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jamestown Resources Inc → Blackey Elkhorn Coal Corp; 1981-11-09 to 1984-11-28; source msha-controller-operator-history
- **operator_operates_mine:** Red Star Coal Company → #1 Load Out; 1984-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leroy  Lackey et al → #1 Load Out; 1984-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Lackey et al → Red Star Coal Company; 1984-11-29 to current/open; source msha-controller-operator-history